<template>
  <div>
    <!--面包屑导航区域-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!--卡片区域-->
    <el-card>
      <!--添加角色按钮区域-->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>

      <!--角色列表区域-->
      <el-table :data="rolelist" border stripe>
        <!--展开列-->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['dbbottom',i1===0 ? 'dbtop':'','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
              <!--渲染一级权限-->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!--一级或二级权限-->
              <el-col :span="19">
                <!--二级权限 for循环-->
                <el-row :class="[i2===0 ? '':'dbtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag type="warning" v-for="(item3) in item2.children"
                             :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!--索引列-->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
            <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
            <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!--分配权限对话框-->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
      <!--树形控件-->
      <el-tree :data="rightlist" :props="treeProps" show-checkbox node-key="id" default-expand-all
               :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
    </el-dialog>
  </div>
</template>

<script>
    export default {
      data(){
          return{
            //所有角色列表
            rolelist:[],
            //控制分配权限对话框隐藏和显示
            setRightDialogVisible:false,
            //所有权限数据
            rightlist:[],
            //树形控件属性数据
            treeProps:{
              label:'authName',
              children:'children'
            },
            //默认选中节点ID值
            defKeys:[],
            //选中授权用户的ID
            roleId:''
          }
        },
      created() {
          this.getRoleList()
      },
      methods:{
        //获取所有角色列表
        async getRoleList(){
            const {data:res}=await this.$http.get('roles')
            if (res.meta.status!==200) return this.$message.error('获取角色列表失败！')
            this.rolelist=res.data
          },
        //展开列权限删除
        async removeRightById(role,rightId) {
            const confirmResult=await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
              confirmButtonText: '确定',
              cancelButtonText: '取消',
              type: 'warning'
            }).catch(err => err)
          if (confirmResult!=='confirm') return this.$message.info('取消了删除！')
          const {data:res} =await this.$http.delete('roles/'+role.id+'/rights/'+rightId)
          if (res.meta.status!==200) return this.$message.error('权限删除失败！')
          role.children=res.data
          },
        //展示分配权限对话框
        async showSetRightDialog(role){
          //获取当前选中用户ID
          this.roleId=role.id
          //获取所有权限数据 tree形
          const {data:res}=await this.$http.get('rights/tree')
          if (res.meta.status!==200) return this.$message.error('获取权限数据失败！')
          this.rightlist=res.data
          //递归获取三级节点ID
          this.getLeafKeys(role,this.defKeys)
          this.setRightDialogVisible=true
        },
        //递归获取所有三级权限ID
        getLeafKeys(node,err){
          if (!node.children){
            return err.push(node.id)
          }
          node.children.forEach(item=>this.getLeafKeys(item,err))
        },
        //关闭分配权限窗口清空defkeys
        setRightDialogClosed(){
          this.defKeys=[]
        },
        //分配权限对话框确定发送请求
        async allotRights(){
          //展开运算符 ...
          const keys=[...this.$refs.treeRef.getCheckedKeys(),...this.$refs.treeRef.getHalfCheckedNodes()]
          const idStr=keys.join(',')
          const {data:res}=await this.$http.post('roles/'+this.roleId+'/rights',{rids:idStr})
          if (res.meta.status!==200) return this.$message.error('分配权限失败！')
          this.$message.success('分配权限成功！')
          //刷新列表
          this.getRoleList()
          //关闭对话框
          this.setRightDialogVisible=false
        }
      }
    }
</script>

<style lang="less" scoped>
.el-tag{
  margin:7px
}

.dbtop{
  border-top: 1px solid #eee;
}

.dbbottom{
  border-bottom: 1px solid #eee;
}

.vcenter{
    display: flex;
    align-items: center;
  }
</style>
